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RE: [Demo notebook] QC clinic: photographic evidence and its limits · RWI-24433

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October 30, 2024 at 6:09 am #196739
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Case 29 — What a water-resistance claim does and does not establish

Ask a qualified watchmaker about a suitable test for that individual case and record the test date and method. A photograph or a caseback engraving is not proof of water resistance.